#ifndef __UPDATEMESSAGE_H__
#define __UPDATEMESSAGE_H__

#pragma once

#include "INetwork.h"
#include "NetContext.h"
#include "SyncContext.h"
#include "ContextView.h"
#include "History/History.h"

class CContextView;
typedef _smart_ptr<CContextView> CContextViewPtr;

struct IUpdateAck
{
	virtual ~IUpdateAck(){}
	virtual void Execute( uint32 nFromSeq, bool bAck ) = 0;
	virtual size_t GetSize() = 0;
};

struct SUpdateMessageConfig
{
	SUpdateMessageConfig() : m_pStartUpdateDef(0), m_pView(0) {}
	const SNetMessageDef * m_pStartUpdateDef;
	CContextViewPtr m_pView;
	SNetObjectID m_netID;
};

class CUpdateMessage : public INetSendable, protected SUpdateMessageConfig
{
public:
	CUpdateMessage( const SUpdateMessageConfig& cfg, uint32 flags );
	~CUpdateMessage();

	const char * GetDescription();

	virtual EMessageSendResult Send( INetSender * pSender );
	virtual void UpdateState( uint32 nFromSeq, ENetSendableStateUpdate );
	virtual size_t GetSize();
	virtual void GetPositionInfo( SMessagePositionInfo& pos );

	void SetHandle(SSendableHandle hdl) { m_handle = hdl; }

protected:
	enum EWriteHook
	{
		eWH_BeforeBegin,
		eWH_DuringBegin,
	};

	struct SHistorySyncContext
	{
		CHistory::CSyncContext ctx[eH_NUM_HISTORIES][NumAspects];
	};

	virtual EMessageSendResult InitialChecks( SHistorySyncContext& hsc, INetSender * pSender, SContextViewObject * pViewObj, SContextViewObjectEx * pViewObjEx );
	virtual EMessageSendResult WriteHook( EWriteHook when, INetSender * pSender ) { return eMSR_SentOk; }
	virtual bool CheckHook() { return false; }

	void SentData() { m_anythingSent = true; m_wasSent = true; }

private:
	uint32 m_syncFlags;
	NetworkAspectType m_maybeSendHistories[eH_NUM_HISTORIES];
	NetworkAspectType m_sentHistories[eH_NUM_HISTORIES];
	uint32 m_sentAspectVersions[NumAspects];
	NetworkAspectType  m_immediateResendAspects;
	bool m_wasSent;

	SSendableHandle m_handle;

	EMessageSendResult SendMain( SHistorySyncContext& hsc, INetSender * pSender );
	virtual const char * GetBasicDescription() const { return "Update"; }
	void UpdateMsgHandle();

	// send any scheduled attachments
	EMessageSendResult SendAttachments( INetSender * pSender, ERMIAttachmentType attachments );
	void UpdateAttachmentsState( uint32 nFromSeq, ENetSendableStateUpdate update );
	// are there any scheduled attachments?
	static bool AnyAttachments(CContextView * pView, SNetObjectID id);

	struct SSentAttachment
	{
		SAttachmentIndex idx;
		IRMIMessageBodyPtr pMsg;
		CContextViewObjectLock lock;
	};

	typedef std::vector<SSentAttachment> TAttachments;
	TAttachments m_attachments;

	bool m_anythingSent;

	string m_description;
};

class CRegularUpdateMessage : public CUpdateMessage
{
public:
	static CRegularUpdateMessage * Create( const SUpdateMessageConfig& cfg, uint32 flags );

	virtual void UpdateState( uint32 nFromSeq, ENetSendableStateUpdate );

private:
	CRegularUpdateMessage( const SUpdateMessageConfig& cfg, uint32 flags ) : CUpdateMessage(cfg, flags) {}

	virtual void DeleteThis();

	TMemHdl m_memhdl;
};

#endif
